﻿// Copyright (c) 2011, Adaptiv Design
// All rights reserved.
// 
// Redistribution and use in source and binary forms, with or without modification,
// are permitted provided that the following conditions are met:
//
//     * Redistributions of source code must retain the above copyright notice, this
// list of conditions and the following disclaimer.
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// this list of conditions and the following disclaimer in the documentation and/or
// other materials provided with the distribution.
//    * Neither the name of the <ORGANIZATION> nor the names of its contributors may
// be used to endorse or promote products derived from this software without specific
// prior written permission.
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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namespace Alicanto.Lexing
{
    public partial struct Token
    {
        public static Token Empty = new Token(string.Empty, TokenType.Undefined);

        public string Str;
        public TokenType Type;

        public Token(string str, TokenType type)
        {
            Str = str;
            Type = type;
        }

        internal Token(char str, TokenType type) : this(str.ToString(), type) { }

        #region Operator overloading

        public static bool operator ==(Token c1, Token c2)
        {
            return c1.Str == c2.Str;
        }

        public static bool operator !=(Token c1, Token c2)
        {
            return c1.Str != c2.Str;
        }

        #endregion

        #region Overrides

        public override int GetHashCode()
        {
            return this.Str.GetHashCode();
        }

        public override bool Equals(object obj)
        {
            if (obj is Token) return (Token)obj == this;
            return base.Equals(obj);
        }

        public override string ToString()
        {
            return this.Str;
        }

        #endregion
    }
}
